AN EXPERIMENT WITH A SHORT PATH LENGTH UNATTENDED TROPOSCATTER TELEMETRY LINK IN THE ARCTIC OCEAN

An experiment was performed in the Arctic ocean to evaluate the troposcatter mode of propagation for use as a telemetry tool in obtainin g oceanographic data from remote sites. Data was collected manually and on paper and magnetic tape over a two week period in the spring of 1962. Both transmitting...

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Bibliographic Details
Main Authors: BUCK,Beaumont M., Brown,Walter P.
Other Authors: GM DEFENSE RESEARCH LABS SANTA BARBARA CALIF
Format: Text
Language:English
Published: 1964
Subjects:
*TELEMETER SYSTEMS
*TROPOSPHERE
WAVE PROPAGATION
ARCTIC OCEAN
OCEANOGRAPHIC DATA
RADIOFREQUENCY
DATA TRANSMISSION SYSTEMS
ELECTROMAGNETIC RADIATION
PROPAGATION
SCATTERING
METEOROLOGICAL PHENOMENA
ANALYSIS OF VARIANCE
Arctic
Arctic Ocean
Online Access:http://www.dtic.mil/docs/citations/AD0603198
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0603198
Description
Summary:An experiment was performed in the Arctic ocean to evaluate the troposcatter mode of propagation for use as a telemetry tool in obtainin g oceanographic data from remote sites. Data was collected manually and on paper and magnetic tape over a two week period in the spring of 1962. Both transmitting and receiving sites were located at sea level. The path was mainly over ice with some open water leads and length varied from 80 to 62 miles due to ice drift. The data collected was analyzed and compared with various other path loss prediction equations. The measured path loss was generally 20-30 db greater than most equations. Some of the variations could be accounted for by modification of the weighting factor associated with N sub S (surface radio refractive index) due to the different climatic conditions. Further analysis indicated however that, of the various meterological factors that could influence the path loss, wind velocity produced the maximum correlation. A new equation was then derived from the measured data which included a wind velocity factor as well as an NS factor. This derived emperical equation has a standard error of estimate of 5.3 db with 95% confidence. (Author) Reprint of a paper given at the 1964 National Telemetering Conference, Los Angeles, Calif., 2-4 June 64.

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